汽车在维修企业进行二级维护后，必须进行竣工检验；各项目参数符合国家或行业及地方标准后，即可出厂。
参考答案：错
Miss Gao has taught us English two years. I have been here two years ago. [ ]
A. since; for
B. since; since
C. for; since
D. for; for
十二指肠溃疡的典型症状是
A．进食后呕吐B．疼痛与进食脂肪有关C．进食后疼痛可缓解D．左上腹钝痛E．右上腹痉挛性疼痛
